Autoimmune and dermatologic conditions associated with lichen sclerosus

Clinical efficacy of 5-aminolevulinic acid photodynamic therapy combined with microneedling for vulvar lichen sclerosus

BACKGROUND

Vulvar lichen sclerosus (VLS) is a chronic inflammatory dermatosis with limited therapeutic options for refractory or recurrent cases. This study aimed to evaluate the efficacy and safety of 5-aminolevulinic acid photodynamic therapy (ALA-PDT) combined with microneedling in VLS management.

METHODS

Sixty-four VLS patients (diagnosed from January 2019 to December 2023) underwent ALA-PDT (incubation: 3 hours; irradiation: 635 nm, 100 mW/cm²) combined with microneedling (0.5 mm depth) every 2 weeks for 6 sessions. Outcomes included modified mLSSI score, ISSVD severity grading, Dermatology Life Quality Index (DLQI), dyspareunia Visual Analog Scale (VAS), adverse events, and 6-month recurrence rates.

RESULTS

At 12 weeks, the total efficacy rate reached 92.19 % (59/64). mLSSI scores significantly decreased from 9.07±2.32 to 2.42±1.79 (P < 0.001), with erosion/fissure improvement being most pronounced (86.29 % reduction). ISSVD grading showed complete resolution of severe cases (baseline: 85.94 % vs. 0 % post-treatment), with 90.63 % downgraded to mild. Subgroup analysis revealed superior outcomes in patients with disease duration <1 year (baseline mLSSI: 7.68±2.29 vs. 9.97±1.87 in a long-duration group; t = 4.382, P < 0.0001), particularly in skin texture recovery (90.59 % vs. 83.72 %). DLQI scores decreased by 73.74 % (15.04±2.80 to 3.95±2.02), and 88.89 % (24/27) of patients reported dyspareunia relief (VAS: 5.64±2.58 to 1.50±1.63). Recurrence occurred in 21.88 % (14/64) at 6 months, with no symptom exacerbation (P > 0.05). Only 5 cases (7.81 %) experienced transient erythema, and no severe adverse events were observed.

CONCLUSION

ALA-PDT combined with microneedling achieves rapid and sustained symptom remission, improves quality of life, and demonstrates excellent safety in refractory VLS. Early intervention (disease duration <1 year) correlates with superior therapeutic outcomes. This combination therapy represents a promising strategy for PDT-enhanced VLS management.

A Guide to Screening for Autoimmune Diseases in Patients With Vulvar Lichen Sclerosus

BACKGROUND

The aetiology of vulvar lichen sclerosus (VLS) remains unknown. However, there is evidence that in addition to a genetic predisposition, autoimmunity contributes to the pathogenesis.

OBJECTIVES

The objective of this study was to determine the prevalence of autoimmune disease and positive autoantibody serology in patients with VLS.

METHODS

A VLS database in Sydney, Australia, was retrospectively reviewed. A diagnosis of VLS was required for inclusion in the study. Data collected included demographics, comorbidities including any personal history of autoimmune disease, family history of autoimmune disease, and the results from autoantibody testing. A total of 2243 females with VLS were included in this study.

RESULTS

Autoimmune disease was found in 24.5% and 34.6% of children and adults with VLS, respectively. The most prevalent autoimmune conditions were psoriasis, Hashimoto's thyroiditis, lichen planus, and vitiligo. Antinuclear antibodies were common and found in 31.0% of patients. Thyroid peroxidase and thyroglobulin antibodies were present in 16.1% and 18.9% of cases, respectively. Thyroid function, determined by thyroid stimulating hormone, was abnormal in 8.2% of patients. 5.3% of patients had positive parietal cell antibodies, and 5.9% had low vitamin B12 levels.

CONCLUSIONS

This work provides support that VLS is of an autoimmune aetiology, and that there is an association between VLS and autoimmune diseases. The high proportion of patients with an abnormal thyroid test, positive thyroid antibodies, and intrinsic factor and gastric parietal cell antibodies with low vitamin B12 levels, warrants screening for thyroid disease and pernicious anaemia in patients with VLS. Initial autoimmune screening in VLS can be rationalised to TSH, vitamin B12 levels, intrinsic factor and parietal cell antibodies. Thyroid antibodiy testing shouls be performed in hypothyroid patients.

Management of Lichen Sclerosus and Related Comorbidities at a Tertiary Referral Center: Beyond Topical Steroids

INTRODUCTION

Lichen sclerosus (LS) is a chronic inflammatory dermatosis predominantly affecting the anogenital area, with potential systemic implications.

OBJECTIVE

Our aim was to elucidate its clinical characteristics and management strategies.

METHODS

We conducted a retrospective observational study on adult patients with LS referred to our center between January 2022 and December 2023.

RESULTS

Forty-six adult subjects affected with LS were enrolled in the present study. The majority of patients presented with genital involvement, but a significant subset also exhibited extragenital LS and concomitant immune-mediated disorders. Common symptoms included itching, soreness, and dyspareunia, with characteristic skin findings of erythema and atrophy. Topical corticosteroids were the mainstay of therapy, complemented by alternative treatments in refractory cases. Alternative therapeutic approaches, such as PRP (platelet rich plasma) or ADSC (adipose-tissue derived stromal/stem cell)-based strategies, were effectively employed in refractory cases, in the absence of major adverse events.

CONCLUSIONS

Our findings underscore the importance of alternative approaches in the management of LS and highlight the need for further research to elucidate its pathogenesis and optimize therapeutic interventions.

Sex-related Variations in Comorbidities in Lichen Sclerosus: A Systematic Review and Meta-Analysis

The comorbidities of lichen sclerosus (LS) are presumed but have not been analysed in detail. The purpose of this review was to identify evidence-based associated diseases in patients with LS and explore the potential need for sex-dependent screening protocols. A comprehensive search of the MEDLINE, Embase, and PsycINFO databases from inception to 29 February 2024 was conducted using the key search terms LS and all its synonyms. Pooled odds ratios and 95% confidence intervals of comorbidities were generated using the DerSimonian and Laird random-effects model. A total of 21 case-control studies met the inclusion criteria. Of the 75 comorbidities analysed, only 16 (21.3%) were studied in both sexes, revealing no contrasting associations based on sex. Both female and male LS patients showed significantly increased odds of common dermatological conditions (i.e., lichen planus, vitiligo, alopecia areata, atopic dermatitis, and psoriasis), various cardiovascular risk factors (i.e., essential hypertension, obesity, dyslipidaemia, diabetes mellitus, and diabetes mellitus type 2), genital warts, and hypothyroidism compared with controls. Overall, the scarcity of data currently does not support the implementation of sex-dependent screening strategies. The findings do, however, present significant associations with a range of potentially serious comorbidities, which warrants further elucidation and clinical vigilance.

Lichen sclerosus of the oral mucosa: a hidden phenomenon

Oral lichen sclerosus (OLS) represents a diagnostic challenge even for expert dermatologists due to its rarity and subtle clinical manifestations. Only few cases have been reported in literature to date. OLS typically presents with whitish macules in the oral cavity. Histopathological examination remains crucial for definitive diagnosis, with characteristic features including epithelial atrophy, subepithelial hyalinization, loss of elastic fibers, and lymphocytic infiltration. Management strategies vary depending on lesion size and symptomatic presentation, with topical or intralesional corticosteroids being the most commonly used treatment modalities. Long-term monitoring is recommended due to the potential for malignant transformation, although no cases have been reported to date. Greater awareness and understanding of OLS are essential for accurate diagnosis and effective management. Based on these findings, we recommend performing an accurate evaluation of the oral mucosa, especially when dealing with patients affected by genital or extragenital lichen sclerosus (LS). Moreover, we emphasize the importance of multidisciplinary collaboration between dermatologists and other specialists of oral disorders, such as dentists. This short review briefly summarizes available data on OLS, highlighting its diverse clinical presentations and diagnostic challenges. Despite its infrequent occurrence, OLS should be considered in the differential diagnosis of white macules in the oral cavity.

Risk Factors for Lichen Sclerosus: A Case-Control Study of 43,000 Finnish Women

OBJECTIVES

Lichen sclerosus (LS) is an inflammatory skin disease probably arising from an interplay of genetics, local irritation, and autoimmune processes. We identified potential risk factors for the disease using data from nationwide Finnish registries.

METHODS

We identified all women diagnosed with LS within specialized health care during 1998-2016 (n = 10,692) and selected 3 age-matched population control women for each case. We calculated odds ratios (ORs) for possible risk factors using conditional logistic regression.

RESULTS

Dermatological autoimmune conditions were strongly associated with LS (OR = 15.1, 95% confidence interval [CI] = 13.6-16.7 for morphea; OR = 10.3, 95% CI = 5.02-19.0 for lichen planus; OR = 6.86, 95% CI = 5.65-8.33 for alopecia; OR = 2.20, 95% CI = 1.88-2.56 for vitiligo). A diagnosis of Crohn or celiac disease increased the odds of LS (OR = 1.80, 95% CI = 1.71-1.89; OR = 1.49, 95% CI = 1.28-1.73, respectively) as did urge and stress incontinence (OR = 1.79, 95% CI = 1.71-1.87; OR = 1.28, 95% CI = 1.22-1.35, respectively).The odds of LS were lower in women after a diagnosis of type 1 diabetes (OR = 0.43, 95% CI = 0.41-0.45), coronary artery disease (OR = 0.41, 95% CI = 0.38-0.43), and rheumatoid arthritis (OR = 0.38, 95% CI = 0.36-0.41).Parous women had higher odds of LS (OR = 1.11, 95% CI = 1.04-1.17) than nulliparous ones, but increasing number of births decreased the risk. Lichen sclerosus was not associated with socioeconomic status nor the urbanicity level of the place of residence.

CONCLUSIONS

Certain autoimmune diseases and urinary incontinence were associated with LS.

Advances in the pathogenesis of vulvar lichen sclerosus

Vulvar lichen sclerosus (VLS) is a chronic non-neoplastic skin lesion characterized by vulvar itching, pain, atrophy, whitening of the skin and mucous membranes, and gradual atrophy and disappearance of the labia minora, which can eventually lead to vulvar scarring, causing functional impairment and seriously affecting the patient's physical and mental health. VLS can occur at any age, however, its pathogenesis and etiology are not fully understood. Considerable progress has been made in related research on genetic susceptibility factors, autoimmune disorders, collagen metabolism abnormalities, and their triggering factors in disease formation and progression. This article reviews the etiology of vulvar lichen sclerosus.

The Need of Differential Diagnosis Between Vulvar Lichen Sclerosus and Autoimmune Dermatoses in Adolescent Girls

INTRODUCTION

Vulvar lichen sclerosus (VLS) is a chronic inflammatory condition affecting the anogenital region, which can manifest in prepubertal or adolescent patients. The prevailing theories point to autoimmune and genetic factors. The primary symptoms of VLS typically include vulvar itching, discomfort, dysuria, and constipation. Physical examination often reveals a characteristic figure 8 pattern, involving the labia minora, clitoral hood, and perianal region. However, these symptoms and the age of onset are nonspecific and require differentiation from autoimmune dermatoses such as bullous diseases, pemphigus diseases, epidermolysis bullosa acquisita, and dermatitis herpetiformis. We performed this study to distinguish VLS from autoimmune dermatoses, and in doing so, uncover the underlying causes of chronic vulvar changes. This knowledge will enable healthcare providers to offer appropriate medical care to affected patients.

METHODS

The study was conducted between July 2020 and February 2021, with a sample of 55 girls aged 2-18 years who did not have any systemic diseases. The study group was composed of 20 girls previously diagnosed with vulvar lichen sclerosus, while the control group included 35 girls without VLS. Questionnaires regarding the medical history of the children were completed by their legal guardians. Blood samples were collected and analyzed biochemically to assess human immunoglobulin A (IgA), IgG, and IgM antibodies against various substrates, including the desmosome of stratum spinosum, basement membrane zone, desmoglein 1 (DSG1), desmoglein 3 (DSG3), BP180-NC16A-4X, BP230gC, pemphigoid antigen, collagen type VII NC1, transitional epithelium, gliadin (GAF-3X), endomysium (EMA), and cellular nucleus (ANA).

RESULTS

The analysis of the study group revealed that the most commonly observed signs and symptoms included: itching, soreness, burning sensations, and excoriation, as well as erythema or/and pallor of the skin and perineal mucosa. Among the assessed antibodies, only anti-GAF3x antibodies and ANA antibodies were detected. However, the results did not reach statistical significance (p > 0.5).

The Potential Coexistence of Autoimmune Thyroid Diseases and Pediatric Vulvar Lichen sclerosus

INTRODUCTION

Vulvar lichen sclerosus (VLS), a chronic inflammatory skin disorder, often coexists with autoimmune thyroid disease (AITD). VLS presents with subtle symptoms including vulvar itching and discomfort. Clinically, a "Figure 8" pattern involving the labia minora, clitoral hood, and perianal region is often observed. It is prevalent both in pre-pubertal girls and women aged 40-60, and the link between VLS and AITD remains unclear, with proposed causes including autoimmune, hormonal or genetic factors, and environmental triggers. This study addresses the lack of research on the association in children, aiming to investigate the largest group of underage girls to date.

AIM

This study aimed to investigate the coexistence of thyroid autoimmune diseases in girls diagnosed with vulvar lichen sclerosus (VLS) and to assess the presence of antibodies for specific thyroid autoimmune diseases.

MATERIALS AND METHODS

Our study was conducted from July 2020 to February 2021, involving a sample of 55 girls aged 2-18 years old, all free from systemic diseases. The study group comprised 20 girls previously diagnosed with vulvar lichen sclerosus (VLS), while the control group included 35 girls without VLS. Legal guardians completed questionnaires detailing the medical history of their children. Blood samples were collected from all participants and subjected to biochemical analysis. The presence of human IgG antibodies against thyroid peroxidase and IgG antibodies against thyroglobulin was assessed using the immunoenzymatic method with commercially available ELISA kits.

RESULTS

In the study group, common symptoms included itching, soreness, burning sensation, excoriation, and erythema or pallor of the skin and perineal mucosa. An evaluation of anti-thyroglobulin and anti-thyroid peroxidase antibodies revealed no statistical significance between the study and control groups (anti-TG p = 0.379, anti-TPO p = 0.96). Family history of autoimmune diseases showed no significant correlation with anti-thyroid antibodies in girls. Although no significant relation between VLS occurrence and antibody levels was found, it emphasizes the need for multidisciplinary medical care. Further research with larger patient groups is necessary.

Lichen Sclerosus of the Labial Mucosa: A Case Report and Literature Review

Lichen sclerosus (LS) is an uncommon, chronic, inflammatory mucocutaneous disorder found predominantly in females with unknown etiology. It presents as a white sclerotic plaque commonly located on the anogenital area. Extragenital LS is less prevalent, and LS affecting the oral mucosa is extremely rare, with only 39 biopsy-confirmed cases reported in the literature. Due to its several mimicking conditions, histological examination is usually required for a definitive diagnosis, particularly in patients with oral LS. Current evidence-based treatment recommendations for oral LS are unavailable; however, most cases tend to improve after treatment with topical or intralesional corticosteroids. We report a case of a 58-year-old female referred from the otolaryngology department for evaluating an asymptomatic whitish sclerotic plaque on the lower lip mucosa that had existed for 1 year. Following a punch biopsy, the patient was diagnosed with LS of labial mucosa. The condition improved after 2 months of treatment with topical and intralesional corticosteroids. The present case report raises awareness in recognizing oral LS and contributes to knowledge of this rare disorder.

Treatment and follow-up of genital lichen sclerosus in male children: multidisciplinary management at a tertiary care center

Not available

Extragenital lichen sclerosus: a comprehensive review of clinical features and treatment

Lichen sclerosus (LS) is a chronic inflammatory skin disease commonly affecting the anogenital area with less frequent extragenital occurrence. Extragenital LS cutaneous manifestations vary and precipitating factors are not well described. Recent evidence for etiology and clinical associations of extragenital LS provide insight into disease recognition and pathogenesis. Novel diagnostic techniques as well as treatment standardization have the potential to improve management of this rare condition. This review details both past and new insights into the pathogenesis, clinical manifestations, and treatment options of extragenital LS.

Lichen sclerosus: A C5B-9 mediated chronic microvascular injury syndrome potentially reflective of common adult comorbidities

Lichen sclerosus (LS) is a cutaneous disease of unknown etiology that often involves the vulva or foreskin but also can affect extragenital sites. Regardless of the anatomic site, the histomorphology and presumably pathogenesis are similar. Perhaps a clue to the pathophysiology of LS lies in its frequent association with morphea, specifically, when occurring in an extragenital context. In our experience a striking feature evident in established lichen sclerosis (LS) is one of superficial vascular drop out whereby residual vessels exhibited endothelial cell necrosis and microvascular basement membrane zone thickening, the latter reflective of antecedent episodes of microvascular injury. We sought to understand the pathophysiology that underlies the distinct vascular changes and in doing so, shed light on the pathogenesis of LS. We examined 44 cases of LS over a period of 2019 to 2021. We were able to obtain past medical histories in 34 of the 44 cases. Regarding pathological assessment, the predominant focus was on microvascular changes. We assessed the role of C5b-9 mediated vascular injury in the pathogenesis of the vasculopathy and enhanced type I interferon signaling in vessels given the morphologic semblance to the select interferonopathy syndromes, namely fibrosing dermatomyositis and Kohlmeier Degos disease. We examined the expression of CMV DNA and protein based on prior observations in an earlier study that isolated early protein expression in the microvasculature in the setting of LS and scleroderma. From a clinical perspective, the most striking association was an older age at the time of diagnosis (mean age of 62 years and median age of 61.5 years) and the presence of vascular comorbidities of diabetes, hypertension, and hyperlipidemia in almost 80% of cases. All cases showed significant microvascular changes in the superficial corium with the most frequent findings being those of significant basement membrane zone reduplication and vascular drop out. A number of cases showed prominent microvascular deposits of C5b-9 in the zone of hyalinizing fibrosis or subjacent to the discernible table of fibroplasia in the absence of enhanced type I interferon signaling. In no case were there viral cytopathic changes associated with CMV affecting the endothelium. The studies that encode CMV DNA or protein did not show a significant role for CMV reactivation in endothelium in the majority of the studied cases. It is concluded that the pathophysiology of LS includes a microvascular injury syndrome within the papillary dermis. The mechanism of endothelial cell injury is complement mediated at least in part and could reflect an adaptive immune response targeting endothelium indicative of classic complement pathway activation when coexisting with morphea or occurring in younger individuals. A non-immune based endothelial dysfunction and complement mediated injury unrelated to antibody driven classic complement pathway activation are more likely pathogenetically in the setting of certain diseases like diabetes mellitus and hypertension. Vascular drop out can be explained by the diminished endothelial progenitor pool needed to repopulate the damaged microvessels in certain settings like hypertension and diabetes.

Vulvar Lichen Sclerosus from Pathophysiology to Therapeutic Approaches: Evidence and Prospects

Vulvar lichen sclerosus (VLS) is a chronic, distressing, inflammatory disease with an enormous impact on quality of life. Treatment goals are relieving symptoms, reversing signs and preventing anatomical changes. Despite the availability of numerous therapeutic options, treatment outcome may not be entirely satisfactory and a definitive cure does not exist. This may be due to the fact that the exact VLS etiopathogenesis remains unknown. The objectives of this paper were to review the most up-to-date knowledge on VLS etiopathogenesis and to consider the available therapies through the lens of a plausible pathogenetic model. An electronic search on both VLS etiopathogenesis and its treatment was performed using the National Library of Medicine PubMed database. Based on current knowledge, it is conceivable that various, heterogeneous environmental factors acting on a genetic background trigger an autoimmune, Th-1 response, which leads to a chronic inflammatory state. This, in turn, can determine both tissue and micro-vascular injury and activation of signaling pathways involved in fibroblast and collagen metabolism. This pathogenetic sequence may explain the effectiveness of anti-inflammatory treatments, mostly topical corticosteroids, in improving VLS clinical-pathological changes. Further deepening of the disease pathways will presumably allow key mediators to become new therapeutic targets and optimize the available treatments.